I have an NAD T760 receiver and when I added an outboard 5-channel amp (Sherbourn 5/1500A) I experienced a dramatic improvement in both stereo and 5.1 sound. The key is to select an amp that suits your particular taste.
Don't discount 5-channel amps, either. Many very reputable companies offer them, including McCormack, Krell, EAD, and Bryston.
I know it sounds a little ridiculous right now, but you might actually be better served by breaking up your system into a home theater and a 2-channel system. Then you can leave the NAD receiver on the home theater end and perhaps get a good integrated amp for the 2-channel. I originally dismissed the idea as absurd, and it's by far the biggest improvement I've experienced in my system yet.
I hope this helps to shed light on your situation!
Michael
Don't discount 5-channel amps, either. Many very reputable companies offer them, including McCormack, Krell, EAD, and Bryston.
I know it sounds a little ridiculous right now, but you might actually be better served by breaking up your system into a home theater and a 2-channel system. Then you can leave the NAD receiver on the home theater end and perhaps get a good integrated amp for the 2-channel. I originally dismissed the idea as absurd, and it's by far the biggest improvement I've experienced in my system yet.
I hope this helps to shed light on your situation!
Michael